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Yu Zhao,Nana Li,Bin Xu,Bingzhi Dong,Shengji Xia 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.39 No.-
Hybrid poly(vinylidene fluoride) (PVDF) embedded with Zn–Al layered double hydroxides (LDH)membranes were fabricated via phase inversion. The physical and chemical properties of the novelpolymer membranes were characterized using different characterizations. Filtration and antifoulingexperiments were performed to examine the water permeability, rejection and antifouling ability of theprepared membranes. Results showed that membrane morphology was greatly changed due to theaddition of LDH and that the hybrid membrane exhibited greatly improved surface hydrophilicity, waterpermeability and antifouling property, with contact angle decreased from 76.58 to 69.08 and pure water(PW) flux increased from 8.01 L/m2 h bar to 48.95 L/m2 h bar.
Nana Wang,Xingjian Xu,Li Yang,Lizhu Yuan,Tangfu Xiao,Haiyan Li,Hongwen Yu 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.66 No.-
A sponge-type composite adsorbent xanthate-modified chitosan @ titanate nanotubes (XCTS@TNTs) was prepared via a simple and low-cost procedure, and its adsorption capacity was evaluated in batch and continuous plate column systems. The three-dimensional network macroporous structure made it easy to separate from the solution and suitable for the column-based treatment. The excellent adsorption capacity of Pb(II) was as high as 342.47 mg/g and could be obtained in wide ranges of pH and temperature. Interestingly, XCTS@TNTs exhibited outstanding selectivity for Pb(II) rather than other divalent heavy metal ions. Adsorption mechanism was elucidated by the FTIR and XPS analyses. The column adsorption results indicated that the treatment effect was proportional to bed height and inversely to flow rate and influent concentration. XCTS@TNTs was remarkably effective in the removal of Pb(II) from actual industrial effluents to meet the discharge requirements and contributed to the recovery of Pb(II). The treatment volumes of simulated actual battery wastewater and smelting effluent by 2.40 g XCTS@TNTs were as high as 6360 and 49584 mL for Pb(II) with the concentration of 30.55 and 4.49 mg/L, respectively. This work developed a highly practical process for removing heavy metal ions from practical wastewaters.
ZmFKBP20-1 improves the drought and salt tolerance of transformed Arabidopsis
Yanli Yu,Yanjiao Li,Fengjuan Jia,Meng Zhao,Wencai Li,Qi Sun,Nana Li,Wenlan Li,Zhaodong Meng 한국식물학회 2017 Journal of Plant Biology Vol.60 No.6
FK506-binding proteins (FKBPs), which belongto the peptidyl-prolyl cis/trans isomerase superfamily, areinvolved in plant response to abiotic stresses. A number ofFKBP family genes have been isolated in plants, but littlehas been reported of FKBP genes in maize. In this study, adrought-induced FKBP gene, ZmFKBP20-1, was isolated frommaize and was characterized for its role in stress responsesusing gene expression, protein subcellular localization,transformation in Arabidopsis, expression patterns of thestress-responsive genes, and physiological parameter analysis. During drought and salt stresses, ZmFKBP20-1 transgenicArabidopsis plants exhibited enhanced tolerance, which wasconcomitant with the altered expression of stress/ABAresponsivegenes, such as COR15a, COR47, ERD10, RD22,KIN1, ABI1, and ABI2. The resistance characteristics ofZmFKBP20-1 overexpression were associated with a significantincrease in survival rate. These results suggested thatZmFKBP20-1 plays a positive role in drought and salt stressresponses in Arabidopsis and provided new insights into themechanisms of FKBP in response to abiotic stresses inplants.
Hanfeng Ding,Nana Li,Yanyan Pu,Yongchao Gong,Yanli Yu 한국유전학회 2016 Genes & Genomics Vol.38 No.11
The plant-specific expansin proteins constitute an ancient and major gene family known to have roles in regulating diverse biological processes in plants. Although the functions of many expansin genes have been identified in wheat and other species, little is known about the evolution and genomic locations of the expansin genes in wheat (Triticum aestivum). In this study, a total of 87 expansin genes were identified in the wheat genome, including 52 EXPAs, 42 EXPBs and 4 EXLAs. The EXLB gene was not found in the wheat genome. Phylogenetic tree and comparative analysis revealed amplification of the EXPBs in rice, maize and wheat. The predicted wheat expansins were distributed across 14 of 21 chromosomes with different densities, 3 tightly co-located clusters and 15 paralogous pairs, indicating that tandem duplication and segmental duplication events also played roles in the evolution of expansins in wheat. In addition, the gene structures and conserved protein domains of wheat expansins suggest high levels of conservation within the phylogenetic subgroups. Analysis of a published microarray database showed that most wheat expansin genes exhibit different expression levels in different tissues and developmental stages. To our knowledge, this is the first report of a genome- wide analysis of the wheat expansin gene family, which should provide valuable information for further elucidating the classification and putative functions of the entire gene family.
Some Manifestations of Antioxidation Coating for Hot Precision Forging Gears
Li, Dongcheng,Han, Nana,Quagliato, Luca,Kim, Naksoo,Yu, Ge Hindawi Publishing Corporation 2019 Advances In Materials Science And Engineering Vol.2019 No.-
<P>A high temperature protective coating was prepared onto the surface of 20CrMnTi steel by brushing technique, and the heated billet was subjected to hot forging. Compared with an uncoated sample, the effect of coating on high-temperature oxidation behavior of steel was investigated by scanning electron microscopy-energy dispersive spectroscopy and X-ray diffraction. Before hot forging, an oxide layer of 153 <I>μ</I>m was formed on the surface of the uncoated sample; however, no oxide layer was formed on the surface of the coated sample. After hot forging, the thickness of scale on the surface of uncoated gear forging is 89 <I>μ</I>m while the thickness of coating on the surface of coated gear forging is 39 <I>μ</I>m. It is concluded that such a coating material not only enhances the dimensional accuracy but also improves the surface quality of the gear.</P>
Toyao, Takashi,Ueno, Nana,Miyahara, Kenta,Matsui, Yasunori,Kim, Tae-Ho,Horiuchi, Yu,Ikeda, Hiroshi,Matsuoka, Masaya The Royal Society of Chemistry 2015 Chemical communications Vol.51 No.89
<P>A Zr-based metal-organic framework with tetrakis(carboxyphenyl)porphyrin groups (Zr-MOF-TCPP: MOF-525) has been utilized as a photoredox catalyst to promote oxidative hydroxylation of arylboronic acids under green LED light irradiation. Zr-MOF-TCPP displays a superior catalytic activity for this process over the corresponding homogeneous catalyst (H4TCPP).</P>
Zhaolin Yuan,Junsheng Yu,Nana Wang,Yadong Jiang 한국물리학회 2012 Current Applied Physics Vol.12 No.5
A photodiode with planar heterojunction was fabricated using copper (II) phthalocyanine (CuPc) organic semiconductor and zinc oxide (ZnO) inorganic nanoparticles (NPs, ~5 nm). The currentevoltage (IeV)characteristics of ITO/ZnO NPs/CuPc/Ag device in dark and under illumination with a solar simulator were investigated in detail. The measurement results showed that the device exhibited good rectifying behavior in dark and under illumination. A rectification ratio (RR) of 15.44 at 1.95 V was achieved for the device under 100 mW/cm2 illumination power. Also, the RR of the device as a function of light intensity was observed. The photoresponsive mechanism of the photodiode was illuminated in term of its energy band diagram.
Minyi Qi,Guiying Li,Nana Yu,Yanfeng Meng,Xunyong Liu 한국고분자학회 2014 Macromolecular Research Vol.22 No.9
In this paper, thermo-sensitive polyelectrolyte complex nanoparticles assembled from chitosan-graftpoly(N-isopropylacrylamide) (CS-g-PNIPAM) and sodium alginate-graft-poly(N-isopropylacrylamide) (SA-g-PNIPAM)were prepared for entrapment and release of 5-fluorouracil (5-FU). The morphology and size of the nanoparticles wereobserved by transmission electron microscopy (TEM) and dynamic light scattering (DLS). The polyelectrolyte complexnanoparticles showed a narrow size distribution. The hydrogen bonding interactions between nanoparticles and5-FU, which was determined by fourier-transformed infrared spectroscopy (FTIR), increased drug loading. Glutaraldehyde,as a cross-linking agent, reinforced the nanoparticle structure and decreased the burst drug release. Whenchanging temperature, pH, or ionic strength, a sustained and controlled drug release was observed. The novel complexnanoparticles with environmentally sensitive properties are expected to be useful in the field of intelligent drugdelivery system.
Park, Bernie Byunghoon,Lee, NaHye,Kim, YunHye,Jae, YoonGyu,Choi, Seunghyun,Kang, NaNa,Hong, Yu Ri,Ok, Kiwon,Cho, Jeonghee,Jeon, Young Ho,Lee, Eun Hee,Byun, Youngjoo,Koo, JaeHyung Wiley (John WileySons) 2017 ChemMedChem Vol.12 No.7
<P>Identification of potent agonists of odorant receptors (ORs), a major class of Gprotein-coupled receptors, remains challenging due to complex receptor-ligand interactions. ORs are present in both olfactory and non-chemosensory tissues, indicating roles beyond odor detection that may include modulating physiological functions in non-olfactory tissues. Selective and potent agonists specific for particular ORs can be used to investigate physiological functions of ORs in non-chemosensory tissues. In this study, we designed and synthesized novel synthetic dehydroacetic acid analogues as agonists of odorant receptor 895 (Olfr895) expressed in bladder. Among the synthesized analogues, (E)-3-((E)-1-hydroxy-3-(piperidin-1-yl)allylidene)-6-methyl-2H-pyran-2,4(3H)-dione (10) exhibited extremely high agonistic activity for Olfr895 in Dual-Glo luciferase reporter (EC50=9nm), Ca2+ imaging, and chemotactic migration assays. Molecular docking and site-directed mutagenesis studies suggested that a combination of hydrophilic and hydrophobic interactions is central to the selective and specific binding of 10 to Olfr895. The design of agonists armed with both hydrophilic and hydrophobic portions could therefore lead to highly potent and selective ligands for ectopic ORs.</P>